// Copyright (c) 2004 Brian Wellington (bwelling@xbill.org)

package org.xbill.DNS;

import java.io.*;

/**
 * X.400 mail mapping record.
 * 
 * @author Brian Wellington
 */

public class PXRecord extends Record {

	private static final long serialVersionUID = 1811540008806660667L;

	private int preference;
	private Name map822;
	private Name mapX400;

	PXRecord() {
	}

	Record getObject() {
		return new PXRecord();
	}

	/**
	 * Creates an PX Record from the given data
	 * 
	 * @param preference
	 *            The preference of this mail address.
	 * @param map822
	 *            The RFC 822 component of the mail address.
	 * @param mapX400
	 *            The X.400 component of the mail address.
	 */
	public PXRecord(Name name, int dclass, long ttl, int preference,
			Name map822, Name mapX400) {
		super(name, Type.PX, dclass, ttl);

		this.preference = checkU16("preference", preference);
		this.map822 = checkName("map822", map822);
		this.mapX400 = checkName("mapX400", mapX400);
	}

	void rrFromWire(DNSInput in) throws IOException {
		preference = in.readU16();
		map822 = new Name(in);
		mapX400 = new Name(in);
	}

	void rdataFromString(Tokenizer st, Name origin) throws IOException {
		preference = st.getUInt16();
		map822 = st.getName(origin);
		mapX400 = st.getName(origin);
	}

	/** Converts the PX Record to a String */
	String rrToString() {
		StringBuffer sb = new StringBuffer();
		sb.append(preference);
		sb.append(" ");
		sb.append(map822);
		sb.append(" ");
		sb.append(mapX400);
		return sb.toString();
	}

	void rrToWire(DNSOutput out, Compression c, boolean canonical) {
		out.writeU16(preference);
		map822.toWire(out, null, canonical);
		mapX400.toWire(out, null, canonical);
	}

	/** Gets the preference of the route. */
	public int getPreference() {
		return preference;
	}

	/** Gets the RFC 822 component of the mail address. */
	public Name getMap822() {
		return map822;
	}

	/** Gets the X.400 component of the mail address. */
	public Name getMapX400() {
		return mapX400;
	}

}
